Seiko Cal. 4550 - 172

The 4550-172 is a sought-after Solar piece from Seiko's golden era. With its 19mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-973756ebfcd2]

Also known as: Sumo, Emperor

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1970

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